A facile synthesis method for in situ composites of TiB2/B4C and ZrB2/B4C

Parlakyiğit, Abdullah Selim; Ergun, Celaletdin

doi:10.1007/s41779-021-00700-3

Cited by 4 publications

(4 citation statements)

References 47 publications

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“…For both reaction systems, the initiation step was the magnesiothermic reduction of B 2 O 3 to form MgO and boron, as in Reaction (5). Subsequently, the elemental reaction of Ti with boron took place to produce TiB 2 , as in Reaction (6). Both Reactions ( 5) and (6) were highly exothermic, so the reduction of B 2 O 3 by Ti, as in Reaction (7), was triggered to form TiO 2 and boron.…”

Section: Phase Composition and Microstructure Of Synthesized Productsmentioning

confidence: 99%

“…Such a unique combination of material properties renders TiB 2 suitable for applications in molten metal crucibles, cutting tools, wear resistance parts, high-temperature structural components, cathodes for alumina smelting, ballistic armors, rocket nozzles, etc. [3][4][5][6]. Moreover, TiB 2 has received increasing attention for use as a hightemperature microwave-absorbing material recently on account of its high electrical conductivity, great thermal stability, and outstanding resistance to harsh conditions [3].…”

Section: Introductionmentioning

confidence: 99%

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In Situ Formation of Titanium Diboride/Magnesium Titanate Composites by Magnesiothermic-Based Combustion Synthesis

Yeh,

Chen

2024

Processes

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In situ formation of TiB2–Mg2TiO4 composites was investigated by combustion synthesis involving the solid-state reaction of Ti with boron and magnesiothermic reduction of B2O3. Certain amounts of MgO and TiO2 were added to the reactant mixtures of Ti/B/Mg/B2O3 to act as the moderator of highly exothermic combustion and a portion of the precursors to form Mg2TiO4. Two combustion systems were designed to ensure that synthesis reactions were sufficiently energetic to carry on self-sustainably, that is, in the mode of self-propagating high-temperature synthesis (SHS). Consistent with thermodynamic analyses, experimental results indicated that the increase in pre-added MgO and TiO2 decreased the combustion temperature and propagation velocity of the flame front. MgO was shown to have a stronger dilution effect on combustion exothermicity than TiO2, because the extent of magnesiothermic reduction of B2O3 was reduced in the MgO-added samples. In situ formation of the TiB2–Mg2TiO4 composite was achieved from both types of samples. It is believed that, in the course of the SHS progression, Mg2TiO4 was produced through a combination reaction between MgO and TiO2, both of which were entirely or partially generated from the metallothermic reduction of B2O3. The microstructure of the products exhibited fine TiB2 crystals in the shape of short rods and thin platelets that existed within the gaps of Mg2AlO4 grains. Both constituent phases were well distributed. A novel and efficient synthesis route, which is energy- and time-saving, for producing Mg2TiO4-containing composites was demonstrated.

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Section: Phase Composition and Microstructure Of Synthesized Productsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In Situ Formation of Titanium Diboride/Magnesium Titanate Composites by Magnesiothermic-Based Combustion Synthesis

Yeh,

Chen

2024

Processes

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“…These can increase the fracture inelastic work by more than an order of magnitude when compared with conventional zirconium diboride based ceramics. B 4 C-TiB 2 and B 4 C-ZrB 2 composite particles were synthesized in situ [49] from precursor solutions based on boric acid and sucrose with the addition of Ti ethoxide or Zr oxynitrate, respectively. These reactions were conducted at a temperature of 1650 • C for 1.5 h under argon and hydrogen flows, respectively.…”

Section: Titanium and Zirconium Diboridesmentioning

confidence: 99%

Advanced Boron Carbide Matrix Nanocomposites Obtained from Liquid-Charge: Focused Review

Chkhartishvili

Mikeladze²,

Tsagareishvili³

et al. 2023

Condensed Matter

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Boron carbide is known as a hard material; it possesses a unique complex of physical-mechanical properties and has diverse applications in industries. An expansion of its field of uses stems from the creation of boron carbide matrix nanocomposite materials. In view of this perspective, an effective liquid-charge synthesizing method for their components in nanopowder form has been proposed. This paper provides a focused review on advanced boron carbide matrix ceramic and metal-ceramic nanocomposites recently obtained by the authors using this method. Particular attention is paid to the characterization of boron carbide nanocomposites, including some ceramic borides, metallic alloys and also other metal-ceramic composites.

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“…There are many ways to produce ZnO NPs categorized broadly as physical, chemical and biological methods. Physical techniques like sol gel and spray pyrolysis offer control over the size and shape of the particles [12,13]. Often high temperatures and harsh chemicals [14].…”

Section: Introductionmentioning

confidence: 99%

Unprecedented synergy of ZnO quantum dots/Ag NPs/Nitazoxanide Triumphs composite NPs over multidrug resistant human pathogens as new trend of revolutionizing antimicrobial treatment

Gomaa,

Aleid,

EL-Moslamy

et al. 2024

Preprint

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Antibiotic resistance is currently becoming a more serious threat to global health, especially in severe nosocomial infections treatment by multidrug-resistant bacteria. This research provides a new way of synergizing green-synthesis for zinc oxide quantum dots (ZnO-QDs with hexagonal crystals) that are 7nm in diameter and zero-valent Ag cubic crystals that are 67 nm in size embedded with nitazoxanide substrate (NZ). Instrumental characterization like SEM, TEM, EDAX, and FT-IR and comprehensive antimicrobial studies were conducted to study the incorporation behavior of composites based on Ag NPs/ZnO QDs/NAZ. This combination has not been hitherto addressed anywhere else in the published literature, as well as commercial viability. In this context, we have precisely tuned nanoparticle to nitazoxanide ratio for designing the formulation demonstrating potent activity against MDR infections. By employing nitazoxanide as a scaffold and careful decoration thereof antimicrobial potency has been unlocked overriding conventional therapies. In addition, Ag NPs/ZnO-QDs/nitazoxanide (G6) formula exhibited a therapeutic efficacy span of 96.15±1.68% to 99.57±0.20% against MDR human infections post 48h incubation; a breakthrough in therapeutic efficacy levels has been achieved by our method. Accordingly, ZnO QDs/Ag NPs/NZ composite offered potential multidrug resistant human pathogens as a new trend of revolutionizing antimicrobial treatment.

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A facile synthesis method for in situ composites of TiB2/B4C and ZrB2/B4C

Cited by 4 publications

References 47 publications

In Situ Formation of Titanium Diboride/Magnesium Titanate Composites by Magnesiothermic-Based Combustion Synthesis

In Situ Formation of Titanium Diboride/Magnesium Titanate Composites by Magnesiothermic-Based Combustion Synthesis

Advanced Boron Carbide Matrix Nanocomposites Obtained from Liquid-Charge: Focused Review

Unprecedented synergy of ZnO quantum dots/Ag NPs/Nitazoxanide Triumphs composite NPs over multidrug resistant human pathogens as new trend of revolutionizing antimicrobial treatment

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